One revolution teip means



Sept. 23, 1947. VB. KNAUER I 2,427,992

' ONE nsvownon TRIP mums Filed April 21, 1945 2 Sheets-Sheet 1 INVENTO ae/7&0 K kua' BY v ATTORNEY Se t. 23,1947. I B, KN ER-i 2.427;!)92

' ONE-REVOLUTION TRIP MEANS I Filed April 21, 1945- 2 Sheets-Sheet 2 INVNTOR v ATTORNEY Patented Sept. 23, i947 Berthold Knauer; East N orwalk,Conn assignor' to= Pitney-Bowes; I-nc., a corporationiofDelaie wareApplication-April 21, 1945; Serial No. 589.;556

6 Claims.

Thisinvention relates to a one revolutioncontrol meehanis'm and is:particularly arranged forin: a crank: operated postage printing machine,wherein a postage-'- impression is-printed on mail mat'ter duringeachmachinecycle of operationi As provided bythe present invention, a tripon stop' rele'ase-is adapted to be effected by a slight' reverse motion:ofi the crank handle; This produces-an improved-operation of the machineinthat: it preventsthe operator from-accelerating the crank undulywhenlprinting several successiveimpression's, a situation=whichfrequently oc-V curs inmachihes wheretripping is adapted to beeffected-onithe'forward stroke of the crank.

It is the object of'tliis inventiontherefore to provide, in-a crankcontrolledpostage printing machine, means whereby-the tripping operationfor each succeeding operation iseiiected by a slight reverse movement ofthe crank.

With the above and other objects in view, which will appear as thedescription proceeds, theinvention resides in the combination andarran'gement' of parts and in the details ofconstruction hereinafterdescribed and claimed, itbeing understood that various-changes in theprecise'embodime'ntof the invention hereindisclosed may be madewithihthe scope" of what is claimed I without departing fromthe spirit of theinvention.

A preferred embodiment of theinvention is illustrated in theaccompanyingdrawings, wherein;

Fig. 1'-is aside elevationalview of-a-one revolu tioIrcrank Operatedmachine, including a trip and :one revolution" control mechanism- Fig; 2is a plan-view ofa portionofFigl 1, showing the-one revolutioncontrol-mechanism'on an enlarged scale,-- and is'takenin the directionof the arrow-20f Fig. l; V

Fig. 3=is an end-view; of the one revolution con-=- trol mechanism withpart in section, and is taken along the-li-nes 3--'-3 '0f Fig; 1;

Fig; 4 is a viewsimilarto Fig. 3; with'the control mechanism shown inthe initial reverse crank movementposition;

Fig. 5"is a1soa view similar-to Fig. -3,- withthe control mechanismshown in'stop release position as effected :by the i initial tforward icrank motion; and

Fig.- G-isanother-viewzsimilar to Fig, 3, with theacontrol ame'chanism:shownadurin'g a cycle ofrevolutiom Referring to the drawings in detail,the de- ViCe2 c0mprises-- a' -support 'l0 having-bearings- 2, I II-'I,within 'which-a crank shaft l2 is'adapted to rotate. A crank handle I3is fixed to orie en d of-the-crank shaft l2 t o provide ameans forrotating said shaft' A spiral gear I4; freely mounted on said crankshaft, is adapted-tomesh with anotherspiral gear l6 -to providea drivefor a main drive shaft l 5'. The drive between the crankshaft l'2 andthe gear I4 is effected by means of a coupling collar ll, which collaris fixed to-the crankshaft l2 'by means of a pin 18,

and is coupled withthe-wornigear I4,- as at IS? Thecouplingconnection-comprises a tongue projection2 lon thecollarll-{and'groove 22in a pro jecting' hub 23 -o f-the worm gear l4.Clearance is provided; asindicated'at 24, to effect "lost motion, forapurp'o-se to be later described.

The one-revolution control'for limiting-the rotationof' the-crank shaft,comprises a projection 25 one hub 26, which hub projects from the'wormgear I l-in a direction opposite to the hub 23. A

stop arm- 21a; on arocker memberzl, normally extendsinto the path of theprojection 25- to thus obstruct movement'of the crank shaft 12 aftereach" revolution thereof, The rocker member 27 is fixed to a shaft28,-which shaft is'ro-' tativelysupported-in a bearing-wprovided in thesupport-member H3; The rocker member 2Tfurtherincludes a second arm 29-extending sidewardly, which arm is adaptedto cooperate with acam portion3| on the'hwb 26.

A rocker lever 32 is freely mounted onthe shaft 28 a'nd' has anupwardly'extendedarm33' anda downwardly extended arm 34. mounted on-theupwardly extended arm 33. To the rear of the rocker lever 321s anotherarm 36, which arm is pinned to the shaft 28at 36a'and has a pin 37extending, from the lower end thereof. A-sp-ringiSBhasits coilssurrounding hub portions39' and M extending from the rocker 1ever 32 andarm 36 respectively, and has its ends extending downwardly, with-one end42 engaging a lip 43' projectingfrom the arm 34; and another downwardlyprojecting end i i-engaging a lip 45 projecting froirithear1n36i Bymeans of saidspring, the arm 34 is urged against the lip 45'and both thelever 32-an'd arm 36 normally move as an integral unit but havesufiicient flexis bility to allow independent'movement of the rockerever 32 whenthe crank'moves to its homeposition, as-in Fig. 3.

'The'stop' member 21 is normally locked in' its stop positionthrough'the engagement of a stopshoulder portion' illon a stop plateldwith-the pin 31- projec'ti'ng' from arm 36; The stop plate Mi-ispivotally mountedu'pon a stud 4-1 and has A roller is.

a downwardly projecting detent portion 48, which is normally engaged bya detent spring 49 to normally maintain the stop plate in a blockingposition relative to the pin 31 projecting from the arm 36.

A trigger member 5| is pivotally mounted upon a pin 52, projecting fromthe face of the stop plate 46, and has a. trigger finger portion 53normally projecting into the path of a lug 54 extending from a hub 50pinned to the crank shaft. Said hub 50 forms a part of stop release cam6!, to be later described. A spring 55, coiled around the pin 52, hasone end looped over the trigger finger 53, and the opposite end bearingagainst a boss 56, extending from the stop plate 46. Another finger 51,projecting from the trigger memher 5!, normally bears against the boss56 due to the pressure exerted by the spring 55, as indicated in Figs.2, .3, 4, 5 and 6. .An upwardly extended portion 58, of the stop plate46, normally lies in the path of a lug 59, also projectin from the boss26.

A stop release cam 6|, fixed to the end of the crank shaft I2, has itscam surface bearing against the roller 35, on the rocker lever 32, andis adapted to effect rocking of the stop arm 21a from its stop position,after the crank has received a slight reverse motion from its normalhome position.

In operation, the above-named mechanism functions in the followingmanner:

With the parts in their home position, as shown in Fig. 3, the cycle ofoperation is started by rotating the crank shaft in a clockwise orreverse direction, as viewed from Fig. 3. This will cause the lug 54 toengage the trigger finger 53 and effect rocking of the stop plate 46about its pivot stud 41, as indicated in Fig. 4. The stop shoulder 40 onsaid stop plate 46 is thus removed from the path of the pin 31, and thedetent 48 is removed from its detent position relative to the spring 49.Movement of the stop plate 46 is limited by the engagement of aprojection 62 with an abutment 63, forming a part of a support ID. Therestricted movement of said stop plate 46 also limits the reverse motionof the crank shaft [2.

Reverse motion of the crank shaft I2 is permitted without causingrotation of the main drive shaft l5, due to the lost motion connectionprovided by the tongue and groove 2| and 22, previously described.

The forward or operating motion of the crank shaft can now be effectedin that the stop arm 21a is free to be rocked, as indicated in Fig. 5,when the cam 6! is rocked in a counter-clockwise direction, and the highpoint 64 of said cam engages the roller 35. Referring to Fig. 5, it willbe seen that the stop has been removed from the path of the projection25, which movement occurs during the take-up of the lost motion providedby the tongue and grooved portions 2| and 22. With the stop removed, therotation of the crank shaft can now be made without interruption for onecomplete revolution.

Resetting operations are effected during the rotation of the shaft 12 asfollows: The trigger portion is reset through the engagement of the lug59 with the portion 58, projecting from the stop plate 46, and the stoparm 21a is positively returned to its home position by the engagement ofcam 3| with the arm 29 of the rocker member 21. Therefore, after thecrank shaft has moved through the complete revolution the pro-, jection25 will again engagethe stop arm 21a andall other portions of the devicewill have been 4 reset to their normal positions, as shown in Fig. 3.

Having described the invention what is claimed is:

1. A one revolution control device, comprising, a hand crank shaftincluding a stop engaging member movable therewith, a shiftable stopelement normally positioned in the path of the stop engaging member toobstruct movement when the crank shaft reaches its home position,blocking means obstructing movement of the stop element when the crankshaft is in its home position, means to permit limited reverse rotationof the crank shaft after the said crank shaft reaches said homeposition, and means operable during the reverse rotation of the crankshaft to remove the blocking means from a blocking "a hand crank shaftincluding a stop engaging member movable therewith, a shiftable stopelement normally positioned in the path of the stop engaging member toobstruct movement when the crank shaft reaches its home position,blocking means obstructing movement of the stop element when the crankshaft is in its home position, a lost motion connection operable by thecrank shaft drive to permit limited reverse rotation of the crank shaftafter the said crank shaft reaches said home position, means operableduring the reverse rotation of the crank shaft to remove the blockingmeans from a blocking position relative to the shiftable stop, and meansoperable on the forward movement of the crankshaft to effect movement ofthe stop ele-- ment out of the path of the projecting element.

3. A one revolution control device, comprising, a hand crank shaftincluding a stop engaging member movable therewith, a shiftable stopelement normally positioned in the path of the stop engaging member toobstruct further movement when the crank shaft reaches its homeposition, blocking means obstructing movement of the stop element. whenthe crank shaft is in its home position, means to permit limited reverserotation of the crank shaft after the said crank shaft reaches said homeposition, means operable during the reverse rotation of the crank shaftto remove the blocking means from a blocking position relative to theshiftable stop, and a cam element moved by the crank shaft on itsforward motion and engageable with the shiftable stop element to movesaid stop element out of the path of the projecting element.

4. A one revolution control device, comprising, a rotative element, ahand crank drive for said rotative element, a movable stop normallyurged into an obstructing position relative to said rotative element, asecond stop normally set in a blocking position relative to the movablestop, means to permit slight reverse rotation of the hand crank drivewhen in a home position, and means connected with said drive andoperable during reverse rotation to effect movement of the second namedstop to a non-blocking position relative to the movable stop.

5. A one revolution control device, comprising, a rotative element, ahand crank drive for said rotative element, a movable stop normallyurged into an obstructing position relative to said rotative element, asecond stop normally set in a blocking position relative to the movablestop, means to permit slight reverse rotation of the hand crank drivewhen in a home position, means connected with said drive and operableduring reverse rotation to effect movement of the second into anobstructing position relative to said rotal0 tive element, a second stopnormally set in a blocking position relative to the movable stop, a

second rotative element connected with said drive,

a lost motion connection between the drive and first named rotativeelement to permit reverse movement of the drive without efiectingmovement, of the first named rotative element, said second rotativeelement being adapted to effect movement of the second named stop to anonblocking position relative to the movable stop, and means driven bythe crank drive and operably associated with the movable stop to movesaid stop out of an obstructing position on the fol- 5 lowing movementof the crank in a forwardly direction.

BERTHOLD KNAUER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS 5 Number Name Date 2,273,272 Knauer et al. Feb.17, 1942 1,827,745 Hagemann Oct. 20, 1931 2,219,299 Dawson et al. Oct.29, 1940 1,197,039 Krauth Sept. 5, 1916

